120121201111 has 2 divisors, whose sum is σ = 120121201112. Its totient is φ = 120121201110.

The previous prime is 120121201097. The next prime is 120121201129. The reversal of 120121201111 is 111102121021.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (111102121021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120121201111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120121201091 and 120121201100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120121201141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60060600555 + 60060600556.

It is an arithmetic number, because the mean of its divisors is an integer number (60060600556).

Almost surely, 2^120121201111 is an apocalyptic number.

120121201111 is a deficient number, since it is larger than the sum of its proper divisors (1).

120121201111 is an equidigital number, since it uses as much as digits as its factorization.

120121201111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 120121201111 its reverse (111102121021), we get a palindrome (231223322132).

The spelling of 120121201111 in words is "one hundred twenty billion, one hundred twenty-one million, two hundred one thousand, one hundred eleven".